Fluid-pressure-regulating device



P. 'SYNNESTVEUL FLUID PRESSURE RE-GULATING DEVICE.

PrLIouIoN FILED 1120.21. 1900. l

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l l l l llllllll x j l lllllllllll lllll UNITED STATES Patented January19, 1904.

PATENT OFFICE.

PAUL SYNNESTVEDT, OF GLENVIEW, ILLINOIS, ASSIGNOR TO WESTING- HOUSE AIRBRAKE COMPANY, OF WILMERDING, PENNSYLVANIA, A CORPORATION` OFPENNSYLVANIA.

FLUIDfPRESSURE-REGULATING DEVICE.

SPECIFICATION forming 'part o f Lettersratent No. 749,975, dated January19, 1904.

i Application filed December Z1, 1900. Serial No. 40,706. (No model.)

To all whom it may concer-71,:

Be it known that I, PAUL SYNNEsTvEDT, a citizen of the United States,residing at Glenview, Cook county, Illinois, have invented certain newand useful Improvements in Fluid- Pressure-Regulating Devices, of whichthe following, taken in connection with the accompanying drawings, is aspecification.

My invention relates to Huid pressure regulating valves such as in useespecially in air brake apparatus and the like, and particularly to themeans for moving and seating an inlet valve automatically by means ofthe pressure on the low pressure side. rIhe objects of the inventionare, to provide a valve with positive, direct and powerful seating meansoperated by the outlet pressure; to provide a superior valve seatdesigned to avoid the accumulation of dirt and leakage of the fluidtherethrough; to provide a valve to operate as a check valve againstback pressure, and means for seating it directly and positively from anYabutment on the outlet side, but allowing movement of the abutmentWithout openingthe valve; to provide a superior form of mechanism forthe purposes designed to attain great promptness and nicety in themovements. These objects, and other, advantages which will hereinafterappear, I attain by means of the construction illustrated in preferredform in the accompanying drawings, wherein- Figure 1 is a verticalcentral section of the Whole device; Figure 2 is a horizontal sectionalong the line of the inlet and outlet ports at the upper end of thecasing;

Figure 3 is a partial centralsection taken' vertically along a differentplane from that of Figure l; l

Figure 4 is a side elevation of the improved yoke for operating thevalve from the movable abutment, Figure 5 is a section of the same, andFigure 6 is a plan of the top ring of the yoke as partly cut out toallow of inserting it in its place.

The casing 7 is provided with an inlet 8 and an outlet 9 and withconnecting passages including the valve opening and the chamber 10. Aprojection 14 extends laterally into the chamber 10 and contains abushing provided with a valve seat. Below and in line with the valveseat, in an enlargement of the chamber 10 is a movable abutment 11provided with a stem 17 and normally held upward by the spring 12, whichrests upon the adjusting nut 13 in the lower end of the casing. Attachedto thelupper side of the stem 17, to move integrally with the abutment11, is a yoke 18 comprising preferably three legs 20 extending upwardand carrying a ring 21 within which is screwed a cap 19, designed topush the valve 16 upon its seat. The yoke 18 including the ring 21 ispreferably cast integral, and after the threads 22 are cut therein itmay be sawed open as at 23 in order to clear the neck of the projection14 in putting it in place, after which the cap 19 is screwed into thering 21.

The movable abutment 11 is designed to be put in place from below beforethe parts of the casing are put together, and the valve 16, the valveseat and the cap 19 may be put in vfrom above, when the upper end of thechamber 10 is closed by the screw cap.24. I prefer to use the form ofpuppet valve 16 which seats upon a narrow conical face and is guidedwithin the valve casing by means of the guide wings las shown.

The spring 12, it will be understood, is adjusted by means of the nutf13so that the normal position of the yoke 2O allowsof the valve 16 openingby the pressure on the inlet side. The uid then iiows through the valveport, chamber 10 and the-outlet port 9 until it has accumulated andexerts a pressure upon abutment 11 sufficient to move the same downwardand thrust the valve 16 ontoits seat. If any leakage takes placethroughthe valve,

yit increases the pressure on abutment 11v and thus increases the forceon the cap 19 holding the valve shut. The freedom. of motion of thevalve when the yoke is up, allows it to act as a back check in casepressure is reduced on the inlet side, and variations of the abutmentwill not disturb the valve. It will -be observed, al'so, that thedownward thrust on the cap 19 is direct and unyielding, and consequentlythe valve is closed quickly and positively upon rise of pressure on theoutlet side; while at the same time the valve is perfectly Jfree to openby merely raising its own weight when the yoke 2O is lifted by reductionoi` pressure. The valve can be opened or closed very gradually anddelicately by means of combination of features described.

Having thus described my invention and illustrated its use,what I claimas new, and desire to secure by Letters Patent, is the following:

l. In a pressure regulating` device the combination with a casing havinga main chamber and an inlet and an outlet port, of a boss eX- tendinginto said chamber carrying a conical valve seat and loose puppet valveseated therein, a movable abutment in said mainlchamber subject topressure on the outlet side of the valve and guided to move in verticalguides, and a yoke surrounding said boss, connected directly to themovable abutment and adapted to positively close the Valve on its seat,substantially as described.

2. In a pressure regulating valve device, the 2 5 combination with avalve casing havinga main chamber, of a valve and a seat therefor, andmeans to close said valve on the seat comprising a pressure operatedabutment in the cham ber, and a yoke attached to said abutment, andprovided with legs extending around the valve seat and a screw threadedcap borne on said legs, unconnected to the valve but directly andrigidly engaging the same to push it on the seat when' the abutment ismoved downward by the fluid pressure on the outlet side of the valve.

PAUL SYNNESIVED'I. Witnesses:

PAUL CARPENTER, FRANK GREEN.

